Pacemaking
n. 定步速, 當標兵, 起搏
??? 情景例句
I enjoy camping.
我喜歡露營。
I can't remember what John was doing yesterday afternoon.
我不能記得約翰昨天下午正在做的東西。
Some of the things were hundreds of years old.
展出的一些東西已有數百年的歷史了。